Android Realm-findAll返回带有空参数的对象 [英] Android Realm - findAll returns objects with null parameters

问题描述

我需要在Realm中进行简单的查询，检索MyModel对象的列表，然后在我的应用程序中的其他地方使用它.碰巧，当我查询Realm时，每个对象都有空值，但是 toString 返回期望值.

I need to do a simple query in Realm, retrieve a list of MyModel object and later use it somewhere else in my app. It happens that once I query Realm, each object has null values, but the toString returns the expected values.

型号:

@RealmClass
public class MyModel extends RealmObject implements Serializable {

public static final String KEY_MODEL = "key_myModel";

@PrimaryKey
private int id;
private String myStr;
private int myInt;

//.... getters and setters

@Override
public String toString() {
    return "id = " + id
            + "\nmyStr = " + myStr
            + "\nmyInt = " + myInt;
}

}

如何存储值:

public static void storeModel(MyModel model) {
        Realm realm = Realm.getDefaultInstance();
        realm.beginTransaction();
        realm.copyToRealm(model);
        realm.commitTransaction();
    }

如何检索对象:

public static RealmList<MyModel> getNewElementsFromIndex(int indexFrom) {
        Realm realm = Realm.getDefaultInstance();
        RealmResults<MyModel> allValues = realm.where(MyModel).greaterThan("id", indexFrom).findAll();

        RealmList<MyModel> finalList = new RealmList<MyModel>();
        finalList.addAll(allValues.subList(0, allValues.size()));
        return finalList;
    }

当我调用 getNewElementsFromIndex(value)时，我会得到一个项目列表，但是此列表中的所有项目都具有参数 myStr = null 和 myInt = 0 .

When i call getNewElementsFromIndex(value) i get a list of item, but all items in this list have the parameter myStr = null and myInt = 0.

我在做什么错了?

推荐答案

对于托管领域对象，数据不会复制到字段中，而是通过代理getter/setter调用获得它们.

For managed realm objects, data is not copied to the fields, you obtain them through the proxy getter/setter calls.

因此，字段为null且toString()显示值的事实是完全可以预期的，并且行为有据可查.

Therefore, the fact that fields are null and toString() shows the values is completely expected and well-documented behavior.

要查看值，必须为getter方法添加监视.

To see the values, you have to add watches for the getter methods.

请参见文档.

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